{"nrhp_refnum":"76001538","name":"Mt. Olive Road Covered Bridge","other_names":[],"category":"structure","location":{"address":"1 mi. NE of Allensville on Mt. Olive Rd.","address_restricted":false,"city":"Allensville","county":"Vinton County","state":"OH","lat":39.286245148000035,"lon":-82.58916967699997,"geom_source":"nps_gis"},"listed_date":"1976-10-08","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A one-span wooden queenpost truss covered bridge carrying Mt. Olive Road over the middle fork of Salt Creek, about one mile northeast of Allensville in Vinton County, Ohio. It was built in 1875 and is owned by the county.","why_significant":"The bridge was built by George Washington Pilcher, a well-known Vinton County stone mason and builder, and is the only one of his bridges still standing. Very few covered bridges, and few pure queenpost truss bridges, remain in the area. It also sits at the mouth of a valley once crossed by an important trail between Chillicothe and Marietta.","narrative":"Spanning the middle fork of Salt Creek one mile northeast of Allensville, this single-span covered bridge carries Mt. Olive Road in Vinton County, Ohio. Built in 1875 by stone mason and builder George Washington Pilcher, it uses a simple queenpost truss, with vertical high-boarded siding, a metal roof and stone and concrete abutments. It measures 50 feet 6 inches portal to portal and 14 feet 2 inches wide. Steel channels and I-beams were later added for reinforcement. County commissioners accepted the finished bridge on November 9, 1875. Locals once called it the Grandstaff Bridge, after a family that owned nearby land, and both bridge and road take their names from the Mt. Olive Church. The site lies at the mouth of a valley once used by an important trail between Chillicothe and Marietta. Supporters of its listing noted that it is the only surviving Pilcher bridge and one of few queenpost truss bridges left in the area.","period_of_significance":"1875","architect_builder":"George Washington Pilcher","architectural_style":null,"criteria":[],"status_note":"Condition marked fair, original site; steel channels, steel I-beams and a metal roof have been added. Function listed as covered bridge both then and now.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:09.858569-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/76001538.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76001538/b0733ed844-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76001538/b0733ed844-1600.webp","licence":"CC BY-SA 2.0","author":"tcpix","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Mt._Olive_Road_Covered_Bridge.jpg\" rel=\"noopener\">tcpix</a>, <a href=\"https://creativecommons.org/licenses/by-sa/2.0\" rel=\"license noopener\">CC BY-SA 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Mt._Olive_Road_Covered_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71991808","wikipedia":"https://en.wikipedia.org/wiki/Mt._Olive_Road_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q6930302"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/vinton-county/mt-olive-road-covered-bridge-76001538/"}